My_fd

Well i'm just wondering if i can drive my FD around with these mods dp,mp,catback,and intake without a upgrade ecu on 10lbs of boost or is it dangerous. Thanks.

Heisenberg

iTrader: (3)

No on the midpipe. Everything else should be ok.

Mahjik

iTrader: (1)

*IF* you can actually keep the boost under control and at 10 PSI only, yes:

https://www.rx7club.com/3rd-gen-archives-73/stock-ecu-10-psi-myth-308996/

The problem is that most people usually have problems controlling boost with the intake and exhaust opened up.

Rocking Rotary

iTrader: (14)

wont a fuel pump help, if he has a spike the regulator will add the fuel.

SiKoPaThX

iTrader: (2)

Like Mahjik said, if you can actually manage to keep it at 10psi, then yes it is safe. Otherwise, you're looking for trouble.

Snotcycle

go drop $300 on a boost controller, alot cheaper than dropping $3k on a new motor

MakoRacing

iTrader: (12)

Having a boost controller wont stop the creep he'll get from a MP, and adding a fuel pump wont fix it either. Please search for "boost Creep"

dgeesaman

iTrader: (7)

No, it won't. The stock ECU's only protection is fuel cut, which could protect you from boost creeping, but it won't protect against boost spikes.

If you're going to drop money on a boost controller, it's a lot less than $300 - try $30 for a wastegate-only manual boost controller.

Dave

purerx7

iTrader: (61)

To stop or minimize boost creep you need to port the stock wastegate or add some restriction in the exhaust system.

efinifd3s

iTrader: (1)

Would the car run more safe if the boost pills were removed while running a mp, intake, and catback? The reason I ask is because my catalytic converter just died and I want to replace it with a midpipe. I'm currently running with the stock ecu.

SiKoPaThX

iTrader: (2)

It will be safer if you remove the pill, but I don't know if that will keep it down to 10psi or not.

dgeesaman

iTrader: (7)

At least in that case your boost won't be creeping from 10psi - it will creep beginning at 7psi, giving you more time to watch the boost gauge and let off the throttle.

Whether or not you will see creep depends on what other mods you have - any one of a stock cat, downpipe, or intake will often be enough to avoid creeping.

Dave

rynberg

Why don't you just buy a used stock cat for $50 until you are actually ready to properly mod the car?

themonsterisme

iTrader: (2)

ive been driving with only occasional boost creep problems with stock mp 3inch dp and 3inch cat back....it runs at 12 lbs all day no problems...only when it gets cold do i get creep problems....i have no boost controller but it runs at 12 like it was supposed to.....?...not quite sure but no problems yet other than a leaky oil pan gasket.

FallenCho

iTrader: (1)

Just get a high flow cat. It keeps boost regulated and you will still be driving a street legal car.

CantGoStraight

I'm running with no pills, boost controller isn't hooked up yet (still plumbed in stock configuration) and with tired turbo's make 12 to 14 psi with out any trouble. I was told if you remove the pills it shouldn't make over 7psi. So if your going to run open exhaust and intake you will not be able to keep your boos t below 10psi "even if the pills are removed".

rynberg

That isn't boost creep. Stock boost is 10 psi. If you keep running 12 psi constantly on the stock ecu, you're going to need a new motor.